Rotary disc shoulder cutter



July 26, 1960 P. L. WINKEL ROTARY DISC SHOULDER CUTTER Filed July 19,1957 2 Sheets-Sheet 1 Paul L. W/nke/ IN V EN TOR.

IIII IIIIII July 26, 1960 P. L. WINKEL 2,946,145

ROTARY DISC SHOULDER CUTTER Filed July 19, 1957 2 Sheets-Sheet 2 Paul L.Win/rel INVEN TOR.

WW EM ROTARY msc SHOULDER CU'ITER Paul L. Winkel, Glen Elder, Kans.

I Filed July 19,1957, Ser. No. 673,025

1 a 2 Claims. (Cl. s7--143 This invention relates to an attachment foran earth device to cut the high shoulder ofi a dirt or gravel road whilemaintaining the roads with the blade or moldboard of a grader or likemachine.

An object of the invention is to provide an attachment for the moldboardof the grader, the attachment having a rotary disc which automaticallycuts a smooth shoulder on the ditch at the side of the road as themoldboard smooths the roadbcd.

A further object of the invention is to provide an attachment for roadgrading equipment, wherein the rotary disc is capable of beingcontrolled from the cab of the grader or corresponding position of atractor or like piece of equipment. In this way the depth of cut iscapable of being regulated in accordance with the judgment of the manoperating the grader. An important feature of the attachment is itscapability of being applied either to the right or the left side of amoldboard. This is achieved by a simple structural arrangement, thesimplicity of the structure being such as to make it practical forinterchange to right or left sides of a moldboard.

I have been made aware of various prior attachments for road gradingequipment. However, none of these achieve the desired ends in a mannerso simple as my invention, and none is capable of the combination ofquick interchange from right to left side, remote control and alsoadjustment of pitch angle of the rotary cutter. Therefore, it is afurther object of my invention to provide a unique attachment for roadgrading equipment and to provide an attachment which has rather wideapplication in connection with equipment other than road gradingequipment.

Other objects and features of importance will become apparent infollowing the description of the illustrated form of the invention.

Figure 1 is a perspective view of an attachment constructed inaccordance with the invention;

Figure 2 is an elevational view ofthe attachment in Figure 1 showing thesame applied to a moldboard;

Figure 3 is a top view of the attachment in Figure 1;

Figure 4 is an elevational view of the attachment in Figure 3; and

Figure 5 is an enlarged sectional view taken on the line 5--5 of Figure3 and illustrating principally the mounting' bracket by which theattachment is applied to the moldboard of the road grading equipment.

In the accompanying drawings there is a road grader fragmentarilyillustrated and including a part 12 of the chassis, one wheel 14 andmoldboard 16. The moldboard has a cutting blade 18 at its lower edge,although any type of moldboard may serve as the structural support forattachment 20.

My attachment is made of frame 22 that has an elon- United St tes metrof {working ,ormoving machine and more particularly to a):

plate 24 and connected at r Patented July 26, 1960 their upperextremities by a cross member 34. Bracket 28 is constructed of twoupstanding plates 36 and 38 which are also fixed to plate 24 and whichare spanned at their top by cross member 40 that is welded or otherwisefixed in place. The upper part of the frame is formed by an upright 44which is fixed to cross member 34 and a pair of braces 46 and 48 50 isfixed toupright 44 and constitutes a hanger for the hydraulic motor 52.This motor is preferably a hydraulic cylinder. 54 whose upper end isconnected on pivot pin 56 carried by hanger 50 and whose piston rod 58has fork .60 connected thereto. Pivot pin 62 extends through the .sideof thefork and through an' opening in ear 64. L'IfhiS Jean is weldedorothervyise'fixe'd to'the disc beam 66;"*

The beam extends through the brackets 28 and 26 is straddled thereby andhas its inner end mounted for pivotal movement on pin 70. The pin iscarried by the sides of bracket 26 so that the beam is raised andlowered in accordance with the application of fluid or the removal offluid from hydraulic cylinder.

Rotary disc 74 is mounted for rotation on its spindle and in discbearing 76. The bearing is attached to the disc supporting arm 78 thatis constructed of upper and lower plates 79 and 80 whose inner ends reston the top and bottom surfaces of beam 66. A group of holes the graderoperator.

gated bottom plate 24 together with a pair of upstanding bifurcatedbrackets 26 and 28 at opposite ends of the plate 24. Bracket 26 isconstructed of two plates 30 and 32 welded or otherwise secured to thetop surface of 82 is formed in the top plate 79 and there is a hole inbeam 66. Adjustment pin 84 is dropped into a selected hole 82 and thehole in beam 66 to reserve a selected angularity for the arm 78. Theresult is that there is a corresponding selection in the pitch of rotarydisc 74.

- There are means connected with the frame 22 for supporting it oneither end of the moldboard. These means consist in four lower mountingbrackets arranged in pairs 90, 91 and 92, 93. Each of this group isfixed to the lower plate 24 of the frame 22 and each has a shallow rib94 which functions as a shim to bear against the rear surface ofmoldboard 16. There is a pair of bolts 95 and 96 on one plate or side 38of bracket 28, and a corresponding pair of bolts on the opposite side orplate 36' Bracket 98 is, then, 1

of the same mounting bracket. capable of being fastened to either sideof bracket 28 inasmuch as it has a pair of properly spaced holes throughwhich the bolts 95 and 96 on either side of bracket 28 are adapted topass. Bracket 98 consists of a strap 100 a board 16 and bracket offset102 to tilt the bracket with respect to the moldboard. The purpose is toenable the disc 74 to under-cut, when desired. The lower end of thebracket may be mechanically connected by another bolt to the moldboard.This partially supports theat tachment on the moldboard. The remainderof the sup port is derived from boltswhich pass through the slots 106 inthe pair of brackets 90, 91 or 92, 93 which are selected depending onwhether the attachment is applied to the right or left end of themoldboard 16.

In use the hydraulic fluid is applied to the fluid motor by manipulationof a control lever under the control of Therefore the ditch which isautomatically trimmed or cut by rotary disc 74 is capable of beingeither deeper or shallower. The pitch of the disc 74 is regulated byadjustment of arm 78 as describedpreviously. Inasmuch as the attachmentis capable of being applied to either side of the moldboard, it isversatile and need not be duplicated. A single attachment will care forright or left side working.

It is understood that various changes may be made without departing fromthe invention as claimed.

What is claimed as new is as follows:

.1. An attachment for a moldboard for cutting a smooth shoulder at oneend of the moldboard on a road comprising a frame including an elongatedbase plate, a pair inf bifurcated upstanding brackets fixed ,on saidplate at coppositeTendsithereof, a beam overlying and extendinglongitudinally'o'fsaid plate and straddled bysaid brackets withran innerend pivoted to one bracket for raising and lowering of the beam and anouter 'end projecting outwardly beyond said plate, a rotary'shouldercutting disc later-ally adjustably, pivotally mounted on the outer endof thebeam, aihydraulic cylinder and piston rod for raisingandlowering'the beam inclining upwardly and rearwardly of said beam withthe piston rod operatively pivot- :ally connected tothe beam, meansmounting said cylinder 'forraising and lowering together with the pistonrod to compensate-for raising and lowering of the'beam com- :prising 'anupright ontop of one bracket having alateral -:upper arm towhichsaidcylinder is terminally pivoted, and a pair of brace barsinclining downwardly from said upright and fixed to the top of the otherbracket, said plate having means thereon for attaching the frame to amoldboard.

2. The combination of claim 1, said last named means comprising a pairof brackets on said plate at opposite sides thereof, the pairs beingselectively attachable to a moldboard to attach the frame to a moldboardin reversed positions.

References Cited in the file ofthis patent UNITED STATES PATENTS542,483, Linthicum July 9, 1895 379,970 Kruse Feb. 25, 1908 2,561,032Onfrey July 17, 1951 2,646,633 Iahn July 28, 1953 2,740,214 Collins Apr.3, 1956 2,762,285 Yetter Sept. 11, 1956 FOREIGN PATENTS 4,382 AustraliaOct. 22, 1926

